Re: OS/400 on mambo emulator -- MIDRANGE-L

It's very possible here that iOS could be misinterpreted, So to be VERY Clear:

iOS

A mobile operating system by Apple exclusively for its hardware.
https://www.apple.com/ios/ios-13/

IOS

The operating system for many Cisco devices.

https://www.cisco.com/c/en/us/products/ios-nx-os-software/ios-technologies/index.html

IBM i

The operating system we know and love that runs on POWER hardware.
https://www.ibm.com/it-infrastructure/power/os/ibm-i

I'm not trying to be the naming police or tell you what to name your kids. But it would be EXCEPTIONALLY helpful to persons such as myself who deal with ALL THREE of these EVERY SINGLE DAY that the correct names be used.

That and each of the companies that owns these marks also have invested significant capital in their naming. You don't have to like it but using the wrong names won't change what it is.

"A rose by any other name will smell as sweet."

Thank you for your kind consideration in this manner.

- Larry "DrFranken" Bolhuis

www.Frankeni.com
www.iDevCloud.com - Personal Development IBM i timeshare service.
www.iInTheCloud.com - Commercial IBM i Cloud Hosting.

On 5/28/2020 7:39 AM, Vlad Korge wrote:

Right. Do you know if there is a version of iOS to run on bare metal servers?

Cheers,
Vlad.

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxxxxxxxx] On Behalf Of Jim Oberholtzer
Sent: Thursday, May 28, 2020 11:15 AM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: Re: OS/400 on mambo emulator

Basically yes. I don’t think iOS would run under PowerVM. You would need
a POWER compiled version.

On Wed, May 27, 2020 at 4:43 PM Vlad Korge <vladkorge@xxxxxxxxxx> wrote:

Ok, so, basically, your point is that the public emulator is using
OPAL while you need PowerVM to boot iOS, am I understanding it right?

Cheers,
Vlad.

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxxxxxxxx] On
Behalf Of Yvan Janssens
Sent: Wednesday, May 27, 2020 8:27 PM
To: Midrange Systems Technical Discussion
<midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: RE: OS/400 on mambo emulator

The problem is not just the checks in the boot process; it is also the
boot process itself. Pretty much all POWER-based operating systems
(the BSDs, Linux, AIX, but also e.g. Mac OS 9 and Mac OS X) use Open
Firmware to bootstrap their kernels, which IBM i doesn't use.

You can easily observe this yourself; if you have a recent POWER
systems machine you can change between AIX/Linux and IBM i in ASMI (or
the HMC) to IPL an LPAR, and you won't be able to IPL AIX/Linux on a
partition set to IBM i. You also won't get to the OF prompt when
IPL'ing in IBM i mode (which you do in AIX/Linux mode), and also don't
see any OF-related messages.
Instead, you see the early bootstrap SRCs until control is passed on
to IBM i, after which it goes silent.

If you compare modern IBM i with the older versions of OS/400, you'll
find that the boot process is fairly similar. If I'm not mistaken
there used to be a few RedBooks around for Advanced Diagnostics that
describe it in greater detail.

TL;DR, you won't even IPL an I_BASE media on all public emulators; the
firmware images available simply don't know what to do with IBM i
media. If I'd have to make an educated guess, the internal IBM
emulator would have a different firmware image and a bunch of IFDEFs
to exclude modules that emulate IBM i-specific hardware from public
builds - it's how I would do it.

This all happens before the checks Jim here mentions.

-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of
midrangel@xxxxxxxxxxxxxxxxx
Sent: 26 May 2020 17:04
To: 'Midrange Systems Technical Discussion'
<midrange-l@xxxxxxxxxxxxxxxxxx

Subject: RE: OS/400 on mambo emulator

The short answer is no. There are checks for hardware in the boot
process that would not allow it to load.

IBM can does emulate IBM i internally in various ways but that's only
for development and internal testing.

I highly doubt IBM will replicate the ability to emulate IBM i the way
it did with DOS and VM on the mainframes (yes there was a DOS for
mainframes) since many of those customers bought Intel boxes to run it
on. Turned out to be a huge problem in the end for those customers
and IBM. (they were also kinda funny looking to see huge bus/tag
cables to support printers/tape units to this larger than average
floor standing PC, a double wide if you
will)

--
Jim Oberholtzer
Agile Technology Architects

-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of
Vlad Korge
Sent: Tuesday, May 26, 2020 5:01 AM
To: 'Midrange Systems Technical Discussion'
<midrange-l@xxxxxxxxxxxxxxxxxx

Subject: RE: OS/400 on mambo emulator

Just to add some background to the question...
IBM has released a public version of mambo power emulator for x86 3
years
ago:

https://developer.ibm.com/linuxonpower/2017/04/06/new-open-source-tool
-power
-functional-simulator-installer/
<https://developer.ibm.com/linuxonpower/2017/04/06/new-open-source-too
l-power-functional-simulator-installer/>
However, the package is bundled with the Linux image.
So, I wonder if it would be possible to run the i5/OS images on it somehow?
I.e. do something similar to what z-guys are doing with Hercules.

Cheers,
Vlad.

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxxxxxxxx] On
Behalf Of Vlad Korge
Sent: Monday, May 25, 2020 6:58 PM
To: Midrange Systems Technical Discussion
<midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: OS/400 on mambo emulator

Hi,
Has anyone tried running os/400 on mambo? Is it even technically possible?

Cheers,
Vlad.

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Agile Technology Architects
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